Ten years on, researchers have still not quite come to terms with their surprise of 1995. Although discoveries of exoplanets provide fresh perspectives on the search for life in the Universe, it cannot be denied that these planets are very different from those in the solar system. Some of these differences can be explained by reference to the limitations of observing techniques, while others are quite incomprehensible. Overall, it would require admission that the solar system is something very special, and that the theories put forward to explain its formation do not apply universally.
Definition of the semimajor axis of an ellipse with centre C and focus F.
system of vAndromedae
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